Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A method of performing an uplink transmission in a wireless communication system by a user equipment (UE), the method comprising: receiving, from a base station, downlink control information (DCI) for a scheduling of an uplink shared channel; and performing the uplink transmission via the uplink shared channel based on the DCI, wherein the DCI includes a sounding reference signal resource indication (SRS resource indication, SRI) field carrying a SRI and a demodulation reference signal (DMRS) related field, wherein a number of layers for the uplink transmission is determined based on the SRI field, wherein a number of DMRS states for the uplink transmission is differently configured according to the number of layers, and wherein a size of the DMRS related field is configured with a minimum bitwidth representing for a maximum number of DMRS states for the uplink transmission.
This invention relates to wireless communication systems, specifically improving uplink transmission efficiency by dynamically configuring demodulation reference signal (DMRS) states based on the number of transmission layers. The problem addressed is the inefficient use of control signaling resources when allocating DMRS configurations for uplink transmissions, particularly in scenarios where the number of transmission layers varies. The method involves a user equipment (UE) receiving downlink control information (DCI) from a base station for scheduling an uplink shared channel transmission. The DCI includes a sounding reference signal resource indication (SRI) field and a DMRS-related field. The SRI field carries a SRI that determines the number of layers for the uplink transmission. The number of DMRS states available for the transmission is then configured based on the determined number of layers. The DMRS-related field in the DCI is sized with a minimum bitwidth that can represent the maximum number of DMRS states required for the uplink transmission, ensuring efficient signaling. This approach optimizes control signaling by dynamically adjusting DMRS configurations according to the transmission layer count, reducing overhead while maintaining transmission quality.
2. The method of claim 1 , wherein the DMRS related field is a field configured for a port configuration of the DMRS.
This invention relates to wireless communication systems, specifically to the configuration and transmission of Demodulation Reference Signals (DMRS) in downlink transmissions. The problem addressed is the need for efficient and flexible DMRS configuration to support multiple antenna ports in advanced wireless networks, such as 5G New Radio (NR). The invention provides a method for configuring a DMRS-related field to specify the port configuration of the DMRS, enabling precise control over antenna port usage in downlink transmissions. The DMRS-related field is part of downlink control information (DCI) or higher-layer signaling, allowing the network to dynamically adjust the DMRS port configuration based on channel conditions, user equipment (UE) capabilities, or network requirements. This ensures reliable demodulation of downlink data while optimizing resource utilization. The method supports various DMRS port configurations, including single-port and multi-port setups, and can be applied to different transmission schemes, such as single-user MIMO (MU-MIMO) or beamforming. By dynamically configuring the DMRS-related field, the invention enhances spectral efficiency and system performance in wireless communication systems.
3. The method of claim 1 , wherein the size of the DMRS related field is same for candidates of the number of layers applicable to the uplink transmission.
This invention relates to wireless communication systems, specifically to techniques for configuring demodulation reference signals (DMRS) in uplink transmissions. The problem addressed is the need for efficient signaling of DMRS-related parameters to support multiple transmission layers while minimizing overhead and complexity. The method involves determining a DMRS-related field size that remains consistent across different candidates for the number of layers used in uplink transmissions. This ensures that the signaling format for DMRS configuration does not vary with the number of layers, simplifying the implementation and reducing signaling overhead. The approach allows a user equipment (UE) to interpret DMRS-related information without needing to account for variations in field size based on the transmission layer count. The method may include selecting a fixed field size for DMRS-related parameters, such as DMRS ports or DMRS patterns, regardless of whether the uplink transmission uses a single layer or multiple layers. This consistency helps maintain backward compatibility and reduces the need for additional signaling to indicate changes in DMRS configuration. The technique is particularly useful in scenarios where dynamic layer adaptation is employed, as it ensures that DMRS-related signaling remains predictable and efficient.
4. The method of claim 3 , wherein the uplink transmission is performed based on a non-codebook.
This invention relates to wireless communication systems, specifically improving uplink transmission efficiency in scenarios where traditional codebook-based methods are suboptimal. The problem addressed is the inflexibility and inefficiency of codebook-based uplink transmissions, which rely on predefined signal configurations that may not adapt well to dynamic channel conditions or diverse device capabilities. The invention describes a method for performing uplink transmission in a wireless communication system using a non-codebook approach. In this method, a user device (e.g., a mobile terminal) transmits uplink signals to a base station without relying on a predefined codebook. Instead, the transmission parameters, such as modulation, coding, and resource allocation, are dynamically determined based on real-time channel conditions, device capabilities, or network requirements. This allows for more efficient use of available resources and better adaptation to varying environments. The method may involve the user device receiving configuration information from the base station, which specifies how the non-codebook transmission should be performed. This configuration may include parameters like modulation and coding schemes, power control settings, or resource block assignments. The user device then applies these parameters to generate and transmit the uplink signal in a manner optimized for the current conditions. By avoiding the constraints of a fixed codebook, this approach enables more flexible and efficient uplink transmissions, particularly in scenarios with high mobility, diverse device types, or dynamic channel conditions. The invention aims to improve spectral efficiency, reduce signaling overhead, and enhance overall system performance.
5. The method of claim 3 , wherein a bitwidth of the SRI field is determined based on a number of SRS resources in a SRS resource set configured to the UE and a maximum number of layers supported for the uplink transmission.
This invention relates to wireless communication systems, specifically to methods for determining the bitwidth of a Sounding Reference Signal (SRS) Resource Indicator (SRI) field in uplink transmissions. The problem addressed is efficiently signaling SRS resource selection in scenarios where a User Equipment (UE) is configured with multiple SRS resources, ensuring compatibility with the maximum number of supported transmission layers while minimizing signaling overhead. The method involves calculating the bitwidth of the SRI field based on two key factors: the number of SRS resources available in a configured SRS resource set for the UE and the maximum number of layers supported for uplink transmission. By dynamically adjusting the bitwidth according to these parameters, the system optimizes signaling efficiency without compromising transmission flexibility. This approach ensures that the SRI field can accurately indicate the selected SRS resource while accommodating varying uplink transmission configurations. The solution is particularly useful in advanced wireless networks where multiple SRS resources are used for beam management and channel state estimation, and where the number of supported transmission layers may vary depending on the UE's capabilities and network conditions. By dynamically determining the SRI field bitwidth, the method reduces unnecessary signaling overhead while maintaining reliable uplink communication.
7. A method of performing an uplink reception in a wireless communication system by a base station, the method comprising: transmitting, to a user equipment (UE), downlink control information (DCI) for a scheduling of an uplink shared channel; and performing the uplink reception via the uplink shared channel based on the DCI, wherein the DCI includes a sounding reference signal resource indication (SRS resource indication, SRI) field carrying a SRI and a demodulation reference signal (DMRS) related field, wherein a number of layers for uplink transmission is determined based on the SRI field, wherein a number of DMRS states of the DMRS related field is differently configured according to the number of layers, and wherein a size of the DMRS related field is configured with a minimum bitwidth representing for a maximum number of DMRS states for the uplink transmission.
This invention relates to wireless communication systems, specifically improving uplink reception efficiency in base stations by optimizing the configuration of downlink control information (DCI) for uplink scheduling. The problem addressed is the inefficient use of DCI fields for uplink transmissions, particularly in determining the number of transmission layers and demodulation reference signal (DMRS) states, which can lead to suboptimal resource allocation and performance. The method involves a base station transmitting DCI to a user equipment (UE) to schedule an uplink shared channel. The DCI includes a sounding reference signal resource indication (SRI) field and a DMRS-related field. The SRI field carries an SRI that determines the number of layers for uplink transmission. The DMRS-related field has a variable number of DMRS states, which is configured differently based on the number of layers indicated by the SRI. The size of the DMRS-related field is set to the minimum bitwidth required to represent the maximum number of DMRS states possible for the uplink transmission, ensuring efficient use of DCI resources. This approach optimizes uplink reception by dynamically adjusting DMRS configurations based on the transmission layer count, improving spectral efficiency and reducing overhead.
8. The method of claim 7 , wherein the DMRS related field is a field configured for a port configuration of the DMRS.
A method for configuring a demodulation reference signal (DMRS) in wireless communication systems addresses the challenge of efficiently managing reference signals for accurate channel estimation and data demodulation. The method involves adjusting a DMRS-related field to optimize port configurations, ensuring reliable signal transmission and reception. This field is specifically designed to control the allocation and mapping of DMRS ports, which are essential for supporting multiple-input multiple-output (MIMO) communication. By dynamically configuring the DMRS ports, the method enhances spectral efficiency and reduces interference, particularly in high-density wireless networks. The approach leverages predefined port configurations to adapt to varying channel conditions and user equipment capabilities, improving overall system performance. The method ensures that the DMRS is properly aligned with the physical layer parameters, such as subcarrier spacing and symbol duration, to maintain synchronization and minimize errors. This configuration is critical for supporting advanced modulation schemes and high data rates in modern wireless standards. The method may also include additional steps for validating the port configuration and adjusting transmission parameters based on feedback from the receiver. By optimizing the DMRS port setup, the method enables more robust and efficient wireless communication in diverse environments.
9. The method of claim 7 , wherein the size of the DMRS related field is same for candidates of the number of layers applicable to the uplink transmission.
This invention relates to wireless communication systems, specifically improving the efficiency of uplink transmissions by standardizing the size of a Demodulation Reference Signal (DMRS) related field across different transmission configurations. In wireless communication, uplink transmissions from user devices to base stations require reference signals like DMRS to enable accurate demodulation and channel estimation. However, varying the number of transmission layers (e.g., single-layer or multi-layer transmissions) can complicate the design of control signaling, as the DMRS configuration may differ between these cases. This inconsistency increases signaling overhead and processing complexity for both the transmitter and receiver. The invention addresses this issue by ensuring the DMRS-related field size remains constant regardless of the number of layers used in the uplink transmission. This standardization simplifies control signaling, reduces overhead, and improves compatibility between different transmission modes. The method applies to uplink transmissions where the DMRS configuration is dynamically adjusted based on channel conditions or device capabilities, but the field size for DMRS-related parameters (e.g., DMRS ports, density, or pattern) is fixed. By maintaining a uniform field size, the system avoids unnecessary signaling changes when switching between single-layer and multi-layer transmissions, enhancing efficiency and reliability. This approach is particularly useful in advanced wireless systems like 5G and beyond, where flexible transmission schemes are common.
10. The method of claim 9 , wherein the uplink reception is performed based on a non-codebook.
A system and method for wireless communication involves uplink reception in a wireless network, particularly in scenarios where traditional codebook-based techniques are not optimal. The method addresses challenges in achieving reliable uplink communication by using a non-codebook approach, which avoids the limitations of predefined codebook matrices. This technique is particularly useful in scenarios where channel conditions vary dynamically or when codebook-based methods fail to provide sufficient performance. The non-codebook method dynamically adapts to the channel state, improving signal reception quality and reducing interference. It may involve direct channel estimation or other adaptive techniques to optimize uplink reception without relying on predefined codebook structures. The system may include a base station or access point configured to receive uplink signals from user devices using this non-codebook approach, ensuring robust communication in diverse wireless environments. The method enhances spectral efficiency and link reliability by tailoring the reception process to real-time channel conditions, making it suitable for advanced wireless standards and emerging applications.
11. The method of claim 9 , wherein a bitwidth of the SRI field is determined based on a number of SRS resources in a SRS resource set configured to the UE and a maximum number of layers supported for the uplink reception.
This invention relates to wireless communication systems, specifically to the configuration and signaling of Sounding Reference Signal (SRS) resources in uplink transmissions. The problem addressed is efficiently determining the bitwidth of the SRS Resource Indicator (SRI) field in control signaling to balance overhead and flexibility. The SRI field indicates which SRS resource a user equipment (UE) should use for uplink transmission, and its bitwidth must accommodate the number of SRS resources in a configured SRS resource set while also considering the maximum number of supported uplink layers. The method involves calculating the SRI field bitwidth based on the number of SRS resources in the SRS resource set assigned to the UE and the maximum number of layers supported for uplink reception. This ensures the SRI field can uniquely identify each SRS resource while minimizing signaling overhead. The approach optimizes resource allocation by dynamically adjusting the bitwidth according to the UE's configuration and capabilities, improving efficiency in uplink transmissions. The solution is particularly relevant in advanced wireless systems where flexible SRS resource management is critical for performance and reliability.
13. A user equipment (UE) configured to perform an uplink transmission in a wireless communication system, the UE comprising: a transceiver configured to transmit and receive a radio signal; and a processor configured to control the transceiver, wherein the processor is configured to: receive, from a base station, downlink control information (DCI) for a scheduling of an uplink shared channel; and perform the uplink transmission via the uplink shared channel based on the DCI, wherein the DCI includes a sounding reference signal resource indication (SRS resource indication, SRI) field carrying a SRI and a demodulation reference signal (DMRS) related field, wherein a number of layers for the uplink transmission is determined based on the SRI field, wherein a number of DMRS states of the DMRS related field is differently configured according to the number of layers, and wherein a size of the DMRS related field is configured with a minimum bitwidth representing for a maximum number of DMRS states for the uplink transmission.
This invention relates to wireless communication systems, specifically to a user equipment (UE) configured for efficient uplink transmission scheduling. The problem addressed is optimizing the configuration of uplink transmissions by dynamically adjusting demodulation reference signal (DMRS) states based on the number of transmission layers, reducing signaling overhead while maintaining performance. The UE includes a transceiver for radio signal transmission and reception, and a processor to control the transceiver. The processor receives downlink control information (DCI) from a base station, which schedules an uplink shared channel transmission. The DCI contains a sounding reference signal resource indication (SRI) field and a DMRS-related field. The SRI field indicates the number of layers for the uplink transmission, which in turn determines the number of available DMRS states. The DMRS-related field is configured with a minimum bitwidth sufficient to represent the maximum number of DMRS states possible for the uplink transmission, ensuring efficient use of signaling resources. By dynamically adjusting the DMRS states based on the number of layers, the system reduces unnecessary signaling overhead while maintaining accurate channel estimation for uplink transmissions. This approach improves spectral efficiency and reduces control channel resource consumption in wireless communication systems.
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April 14, 2020
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